1 import java.util.Scanner;
 2
 3
 4 public class exercise {
 5
 6     public static void main(String[] args) {
 7         int select;
 8         do{
 9         System.out.println("请问您想要进行单利计算还是复利计算：1.单利 2.复利");
10         Scanner keyin0=new Scanner(System.in);
11         select=keyin0.nextInt();
12         }while(select!=1&&select!=2);
13         System.out.println("请输入您想要存储的金额数量：");
14         Scanner keyin1=new Scanner(System.in);
15         double originalMoney=keyin1.nextDouble();
16         System.out.println("请输入您想要存储金额的时间(年):");
17         Scanner keyin2=new Scanner(System.in);
18         int year=keyin2.nextInt();
19         System.out.println("请输入您想要设计的年利率：");
20         Scanner keyin3=new Scanner(System.in);
21         double rate=keyin3.nextDouble();
22         double sumValue=originalMoney;
23         if(select==1)
24         {
25             double singleValue=originalMoney*(1+rate*year);
26             System.out.println("存入第"+year+"年后的存款总额为："+singleValue);
27             do{
28                 System.out.println("请问您想要计算本金问题吗：1.需要 2.不需要");
29                 select=new Scanner(System.in).nextInt();
30                 }while(select!=1&&select!=2);
31             if(select==1){
32                 System.out.println("请输入您想要筹到的金额：");
33                 singleValue=new Scanner(System.in).nextDouble();
34                 System.out.println("请输入您想要存储金额的时间(年):");
35                 year=new Scanner(System.in).nextInt();
36                 System.out.println("请输入您想要设计的年利率：");
37                 rate=new Scanner(System.in).nextDouble();
38                 originalMoney=singleValue/(1+rate*year);
39                 System.out.println("需要本金"+originalMoney+"元");
40             }
41         }
42         else
43         {
44         for(int i = 1 ; i<=year; i++){
45                sumValue= (1+ rate)*sumValue;
46
47         }
48         System.out.println("存入第"+year+"年后的存款总额为："+sumValue);
49         do{
50             System.out.println("请问您想要计算本金问题吗：1.需要 2.不需要");
51             select=new Scanner(System.in).nextInt();
52             }while(select!=1&&select!=2);
53         if(select==1){
54             System.out.println("请输入您想要筹到的金额：");
55             sumValue=new Scanner(System.in).nextDouble();
56             System.out.println("请输入您想要存储金额的时间(年):");
57             year=new Scanner(System.in).nextInt();
58             System.out.println("请输入您想要设计的年利率：");
59             rate=new Scanner(System.in).nextDouble();
60             for(int i = 1 ; i<=year; i++){
61                    sumValue= sumValue/(1+ rate);
62
63             }
64             originalMoney=sumValue;
65             System.out.println("需要本金"+originalMoney+"元");
66         }
67         do{
68             System.out.println("请问您想要计算时间问题吗：1.需要 2.不需要");
69             select=new Scanner(System.in).nextInt();
70             }while(select!=1&&select!=2);
71         if(select==1){
72             System.out.println("请输入您想要存储的金额数量：");
73             originalMoney=new Scanner(System.in).nextDouble();
74             System.out.println("请输入到期后您想要获取的金额：");
75             sumValue=new Scanner(System.in).nextInt();
76             System.out.println("请输入您想要设计的年利率：");
77             rate=new Scanner(System.in).nextDouble();
78             year=1;
79             for(; sumValue>originalMoney;year++){
80                 originalMoney= originalMoney*(1+ rate);
81
82             }
83             year--;
84             System.out.println("需要"+year+"年时间");
85         }
86
87
88
89         }
90
91     }
92
93 }